Trannys fine. Chillcast housing with ┤92 internals strenhtened. Busted the primary chains with 8th primary twice though so I sold the 8th and with 7th its fine. Torque is restricted to 400 nm so it┤ll be OK i think, hp dont kill trannys only early quick building torque at low rpm. Look at the 100-200 4th gear acc. boost rises fron 1.bar at low rpm to 1.3 at the rev limit.

Holy crap impressive! I didn't think a B202 /w T8 pistons (like my '85 block) was a good mate with the 2.1L head, but I guess that gives you a pretty low compression ratio. Is it a T5 or T7 head, or just a regular c900 head? Makes me wonder if MS is the right route...

I would've loved to see the reaction on the face of the guy driving the M5. Wish I had my 5-speed internals strengthened in the chillcast, but I don't necessarily need (or could produce) accel like that! I'm surprised you could keep wheel-spin to a minimum against an RWD. Did you have like super strong springs in the back? Mine are 650 lb/in, but I doubt it could keep the front on the ground when it counted.

Holy crap impressive! I didn't think a B202 /w T8 pistons (like my '85 block) was a good mate with the 2.1L head, but I guess that gives you a pretty low compression ratio. Is it a T5 or T7 head, or just a regular c900 head? Makes me wonder if MS is the right route...

I would've loved to see the reaction on the face of the guy driving the M5. Wish I had my 5-speed internals strengthened in the chillcast, but I don't necessarily need (or could produce) accel like that! I'm surprised you could keep wheel-spin to a minimum against an RWD. Did you have like super strong springs in the back? Mine are 650 lb/in, but I doubt it could keep the front on the ground when it counted.

li Arc

IIRC there are 2 kinds of T8 pistons, pre APC and APC pistons. I use the late ones and they shouldn┤t lower the compression ratio as much. I forgot to write it but we modified the 2.3 head by removing some material to make it smooth and round. I think it was equal to 2 ml of fluid in each chamber. I dont know for sure but my guess is compression ratio is 1:8.75 or close to that.

No super strong springs in the back. remember it was 110-220 we raced.

The M5 would probably win from 0-200 because of my FWD and manual gearbox, but wheelspin is no problem. Thats the beauty of T5.5, it allows you to restrict boost in 1st and 2nd gear, and because I let boost slowly increase in 3th it doesn┤t spin.

hardware changes are mentioned above. You need complete trionic 5.5 from a donor car. A bit tricky to build on to the car, had help from a skilled guy. then you download T5 suite and with a laptop and canbus you can map the car while driving. I can e-mail my binfile to anyone interestet. just sent pm.
I hope I answered your question.
cheers
SG